20538089 has 32 divisors (see below), whose sum is σ = 25740288. Its totient is φ = 16128000.

The previous prime is 20538043. The next prime is 20538109. The reversal of 20538089 is 98083502.

It is a cyclic number.

It is not a de Polignac number, because 20538089 - 2⁸ = 20537833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20538019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181697 + ... + 181809.

It is an arithmetic number, because the mean of its divisors is an integer number (804384).

Almost surely, 2^20538089 is an apocalyptic number.

It is an amenable number.

20538089 is a deficient number, since it is larger than the sum of its proper divisors (5202199).

20538089 is a wasteful number, since it uses less digits than its factorization.

20538089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 20538089 is about 4531.8968434862. The cubic root of 20538089 is about 273.8545812268.

The spelling of 20538089 in words is "twenty million, five hundred thirty-eight thousand, eighty-nine".